Wheel-dressing device



Jan. 5 1926.

H. M. ROCKWELL WHEEL DRESSING DEVICE Original Filed y 29, 1920 Hm .MHWN hm nu ll\ll \HTARIJ INVE/V 7'01? Maw Mficm a L.

W A 7' TOR/VE) Patented Jan. 5, 1926.

UNITED STATES PATENT OFFICE.

HUGH M. ROCKW'ELL, F BRISTOL, CGNNECTICUT, .ASSIGNOR, BY MESNE ASSIGN- MENTS, TO STANDARD STEEL AND BEARINGS INCURPOEATED, OF WILMINGTON;

DELAWARE, A CORPORATION OF DELAWARE. i

WHEEL-DRESSING DEVICE.

Application filed May 29, 1920, Serial No. 385,224. Renewed May 29, 1925.

To all whom. it may concern.-

Be it known that I, IIUGH M. RooKwnLL a citizen of the United States, and a resident of Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in WVheel-Dressing Devices, of which the following is a specification.

This invention relates to devices for dressing the cutting surface of a grinding wheel or the like.

It is generally customary in the grinding of the raceways of ball bearings, to shape the cutting surface of the wheel to substantially conform to the curvature of the ball groove to be ground. It is the object of this invention to provide a tool for dressing the cutting surface of such a wheel which will give the desired ciurvature thereto.

To attain this object a diamond. is adjustably mounted in a member which is rotatably carried by one end of an arm or lever pivotally mounted on a plate attached to the housing or head in which is journaled the wheel-carrying spindle. The aforementioned plate is mounted on said housing for reciprocation in a direction at right angles to the axis of rotation of the wheel. A stop is provided to limit the pivotal movement of said arm. To dress the wheel the arm is swung into position against the stop to bring the diamond into position to contact with the wheel and the carrier is then oscillated to move the diainond across the cutting face of the wheel. The diamond is kept in position to engage the Wheel as the latter becomes smaller by feeding the plate on which the arm is pivotally mounted toward the center plane of the head.

In the accompanying drawings is disclosed an embodiment of the invention as applied to a machine for grinding the raceway on the inner surface of the outer race member, wherein Fig. 1 is a side elevation;

Fig. 2 is an enlarged plan view;

Fig. 3 is an end view;

Fig. 4 is a detail.

On a standard 1 are mounted the heads 2 and 3 which are movable relative to each other to bring the work and the tool carried by them into cutting relation. On the head 3, in which the tool spindle is journalled, is reciprocatively mounted the plate 4- which may be adjusted in a direction at right angles to the axis of rotation of the tool spindle by means of the feed screw 5. The plate 4; is provided with a cylindrical stud 6, upon which is rotatably mounted the lever 7. In the end of the arm 8 of the lever 7 is provided a bore in which fits the shaft 9, having at its upper end an oblique-faced groove 10 in which is arranged a coiled spring 11 which bears against the surface of the lever 7 and serves to maintain the endwise adjustment of the shaft 9. A bracket 12 having at its lower end a split aperture is carried by the shaft 9. The pin 13, carrying at one end the diamond 14., extends through said aperture andis clamped therein by means of the bolt 15. In the arm 16 of the lever 7 is mounted a ratchet 17 which is arranged to hold the lever with its arm 16 against the stop 18 mounted on the plate at.

In the lower face of the shaft 9, coaxial therewith, is a tapered socket 19 in which is adapted to lit the tapered shank 20 of a gage having a circular head 21 which is of the same radius as that at which is desired to set the diamond. Having the device set up, the gage is placed with its shank in the socket and the pin 13 is tapped to bring the diamond into contact with the periphery of the head 21, after which the bolt 15 is tightened to clamp it in place. The gage is then removed and the device is ready for use.

In operation the lever 7 is rotated to bring the arm 16 into engagement with the stop 18 which is so arranged that when thus engaged the diamond point is in position to engage the cutting surface of the wheel to be dressed. The bracket 12 and shaft 9 are then oscillated about the axis of the shaft 9 by means of the protruding end of the pin 13 to dress the surface of the wheel. By rotating the feed screw 5 the diamond may be adjusted to compensate for the wear of the cutting surface of the wheel with a change in its radius.

\Vhat I claim is:

1. A device of the character. described, comprising a plate adjust-ably mounted on the wheel-carrying head, a lever pivotally mounted on said plate, a stop on said plate, an arm, a ratchet on said arm to hold it against said stop, a shaft rotatably mounted in one arm of said lever a bracket carried by said shaft and a dressing tool carried by said bracket. 1

2. A device of the character described said lever in one position, a shaft rotatably 10 mounted in said lever, :a bracket carried by said shaft and a dressing said bracket.

tool carried by THUGH M. ROCKWELL. 

